Process of casting iron in permanent molds.



E. A. OUSTER.

PROCESS OF CASTING IRON IN PERMANENT MOLDS.

APPLICATION FILED 001'. 26, 1910.

1,097,848. Patented May 26, 19m

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UNITED STATES PATENT OFFICE.

EDGAR A. GUS'IER, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE CUSTER SANDLESS CASTING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORA- TION OF DELAWARE.

Specification of Letters Patent.

Patented May 26, 1914.

Application filed October 26, 1910. Serial No. 589,118.

To all whom it may concern:

Be it known that I, EDGAR A. Cos'rnn, a citizen of the United States, and a resident of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in Processes of Casting Ironin Permanent Molds, of which the following is a specification, reference being had to the accompanying drawings, forming a part hereof.

The object of this invention is to provide a process whereby the molten metal may be introduced into the matrix of the mold to fill the same almost instantly and may be caused to cool at diflferent rates in different parts of the casting so that the entire casting may be brought to the point of setting at practically the same instant and a casting of uniform grain texture or character throughout be produced.

The accompanying drawings illustrate one form of apparatus adapted for the practice of my improved process, in which:

Figure 1 represents a side view of one of the sections of a mold adapted for carrying out my improved process in the making of a pipe fitting. Fig. 2 represents a cross section on the line 22 of Fig. 1.

My improved process consists essentiall in filling the matrix of a suitable mold witi molten metal very quickly, causing that portion of the casting contiguous to thegate of the mold to setsimultaneously with the rest of the casting, and removin the casting from the mold immediately a ter it has set.

In the apparatus shown in the accompanying drawings the mold is formed of two parts or sections a hinged together in any suitable manner as at b, so that the mold may be readily opened. Both the sprue o and the .gate d of the mold have sufiicient capacity to permit the matrix e of the mold to be filled almost instantly with molten metal to form the casting 1, which is formed around removable cores 9. Preferably one or more channels or passages h are provided in the mold adjacent to the gate, which are connected with supply pipes 71 for water or other liquid to control the temperature of the walls of the gate, whereby that portion of the casting contiguous to the gate may be caused to cool at a more rapid rate than the metal first entering the mold and gradually cooled in its passage through the mold and thereby ba-caused to set simultaneously with the rest of the casting. The mold sections are provided with inserts j which have the gate and portions of the sprue and matrix formed therein, and which may be of any suitable metal or composition possessing special heat-resisting properties. The passages 72. for the heat controlling liquid are also formed in said inserts.

In practising my improved process the molten metal is introduced into the matrix through the gate, which is of such large section with respect to the matrix that the matrix will be filled almost instantly, and consequently that portion of the casting contiguous to the gate which is subject to the cooling of the medium in the pipes '11 is brought to the point of setting simultaneously, and to the same extent as the rest of the castin Consequently the casting will be of uni orm grain or texture throughout the entire casting, and bleeding of the casting as a result of internal strains will be prevented.

I claim as my invention:

1. The process of casting iron in permanent molds, which consists in introducing the. metal into the matrix of the mold to fill the same almost instantly, causin the metal to cool at difi'erent rates in di erent parts of the casting whereby the entire casting will set simultaneously, and then removing the casting from the mold.

2. The process of casting iron in permanent molds, which consists in introducing the molten metal quickly into all parts of the matrix of the mold, causing the metal to cool at difl'erent rates whereby the metal will set simultaneously through casting, and then removing the casting from the mold.

3. The process of casting iron in permanent molds, which consists in pouring the molten metal rapidly into the matrix of the the entiremold, cooling the portion of the casting ad- This specification signed and witnessed jaeent to the gate of the mold relatively more this 15th day of October, A. D., 1910. rapidly than the other portions of the cast- EDGAR A. CUSTER. ing, to cause the metal to set simultaneously Signed in the presence of throughout the casting, and then removing AMBROSE L. OSHEA, the casting from the mold. N. A. SMITH. 

